Liquid-level indicator for lamps.



No; 714,377. Patented Nov. 25,1902. 7 7 w.n. JEAVONS.

LIQUID LEVEL INDICATOR FOR LAMPS.

(Application filedMay 1, 1902.)

(No IndsL) ATTEET. v mvimuna' BY 7 AUX WILLIAM R. JEAVONS,

ATENT OFFICE.

OF CLEVELAND, OHI O.

LIQUID-LEVEL INDICATOR FOR LAMPS.

SPECIFICATION forming part of Letters Iatent No. 714,377, dated November 25, 11902.

Application filed May 1, 1902. Serial No. 105,545. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM R. J EAVONS, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and usefullmprovements in Liquid-Level Indicators for Oil-Lamps; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the artto which it appertains to make and use the same.

My invention relates toa liquid-level indicater for oil-lamps and other closed vessels; and the object of the invention is to provide an indicator which is constructed and adapted to operate substantially as shown and described,'and particularly pointed out in the claims;

In the accompanying drawings, Figure 1 is a side elevation of a lamp-body with a portion broken away and disclosing my new and improved level-indic'ating mechanism in working position thereon. Fig. 2 is a perspective view of said mechanism alone, and Fig. 3 is a plan'view of the float and its arm.

A represents what in this instance is a lamp or lamp-body, but which may be any other vessel adapted to hold liquidand whichit is desirable to have equipped with a liquidlevel attachment of this kind. In the case of a lamp, and especially in those that have opaque bodies, so that the contents cannot be seen through them, it is difficult to tell how much oil there may be in the same or how nearly empty or filled it may be as lamps usually are made and used; but with my new device the exact level of the oil, whether high or low or intermediate, can be seen ata glance and is always manifest on the top of the lamp. To this end I provide the opening in the lamp with a shell or casing B and occupy this with a suitable plug-or cork C, which in this case is struck up from sheet metal and provided with a bayonet-joint connection in its seat, whereby it maybe rotated only a slight distance and yet be safely seated and be easily removed in like manner. Such slight rotation isimportant because of the mechanism carried by the cork. The top or cover 2 of this plug or cork is constituted a dial, with suitable marks thereon for reading the state or depth of the contents of vessel A. Pendent from said plug is a hanger D, with a lower horizontal portion 4 lying beneath the center of the cork. and a spindle or shaft E is supported thereon and extends centrally through the cork and dial-plate 2 and has an indicator-finger5 fixed thereon, like the finger or hand of a clock. This or any equivalent indicator may be used. On the lower end or portion of said shaft E, I have a spur-wheel 6, and a segmental rack G has its teeth 7 in mesh therewith. The said rack or segment is pivoted at 8 on hanger D, andarm h of float H is rigidly fixed to said segment G, which has lateral lugs or projections 9, adapted to engage the edges of hanger D and limit the rotation of said segment on its pivot.

Obviously the movement of the float in either direction, up or down, will tell on the indicating mechanism, and finger orindicator 5 is set in respect thereto and to the face of the dial to tell the exact level of the liquid in the vessel at all times.

Segment Gis shown as having two holes 10, through which the end of float-arm h is extended, first on a curvature, as seen in Fig. 3, so as to get the end of the arm through the second hole 10, and then this portion of the arm is flattened, and thus also securely locked in the segment. This construction of the parts enables arm h to be cutofl to any desired length, according to the size of the vessel used, and then fastened without special fastening means other than the holes in which it is engaged. As thus shown and described the plug and its attachments constitute together an article of manufacture and sale and are together attachableand detachable or removable from the vessel. The bayonetjoint is important for this reason, as by only a short turn it enables me to disconnect the plug, and thus onlya short sweep of the float is required.

What I claim is 1. A vessel and a level-indicating mechanism therein comprising a plug for the vessel, a hanger on said plug and a spindle supported from said hanger, an indicatoron said spindle at the top of the plug a wheel thereon beneath the plug, a segmental rack pivoted on said hanger and engaging said wheel, and a float rigidly engaged with said rack, substantially as described.

2. A plug having a dial on its upper face, its rotation, and a float engaged with said a hanger projecting from the lower portion of rack, substantially as described. IO said plug, a spindle havingits lower endjour- Witness my hand to the foregoing specifinaled in said hanger and projecting through cation this 26th day' of April, 1902.

said plug and carrying an indicator to travel WILLIAM R. J EAVONS.

over the dial, a Wheel on said spindle and a Witnesses:

segmental rack engaged therewith and piv- R. B. MOSER,

oted on said hanger and having stops to limit T. M. MADDEN. 

